Absence of the septum pellucidum (meaning translucent wall in Latin - SP), also known as the ventricle of Sylvius. The septum pellucidum is a thin, triangular double membrane separating the frontal horns of the right and left lateral ventricles of the brain. It extends between the anterior portion of the corpus callosum, and the body of the fornix and its width varies from 1.5 to 3.0 mm. [ https://orcid.org/0000-0002-0736-9199 http://www.ncbi.nlm.nih.gov/pubmed/30725733 ]
Synonyms: Absence of the septum pellucidum Absence of septum pellucidum Agenesis of the septum pellucidum Missing septum pellucidum
Term information
- SNOMEDCT_US:253143001
- UMLS:C0431371
In contrast to the septum pellucidum, the cavum septum pellucidum (CSP) is a potential cavity between the membranous leaves of the septum pellucidum, separated by at least 1 mm, and is considered a normal anatomical variation.
Term relations
- has part some (
absent and
characteristic of some septum pellucidum and
has modifier some abnormal)